Originally Posted by vizjerei 
I wonder what is that "Capture/System Test" with 1 to 4 item do...
I'm not sure but check out this thread on dpreview. The OP has a theory that the test 1-4 in the camera has something to do with the vertical and horizontal sensor data. BTW, this is the 1.1 firmware with the debug menu that Pentax removed in 1.3. So I'm not sure if the debug test 0-4 (or is it 0-3?) is the same as the software posted above. Since I have only used the debug menu (and still do) I can't vouch for the software above.
It is interesting though...
Debug mode AF area test explained!: Pentax SLR Talk Forum: Digital Photography Review